package com.example.gymnasiumsystem.util;

import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class DBUtil {
    private volatile static DataSource dataSource=null;
    private static DataSource getDatasource(){
        if(dataSource==null){
            synchronized (DBUtil.class){
                if(dataSource==null){
                    dataSource=new MysqlDataSource();
                    ((MysqlDataSource)dataSource).setUrl("jdbc:mysql://127.0.0.1:3308/GymDatabase?characterEncoding=utf8&useSSL=false");
                    ((MysqlDataSource)dataSource).setUser("root");
                    ((MysqlDataSource)dataSource).setPassword("105528clzyf.");
                }
            }
        }
        return dataSource;
    }
    public static Connection getConnection() throws SQLException {
        return getDatasource().getConnection();
    }
    public static void close(Connection connection, PreparedStatement statement, ResultSet resultSet){
        if(resultSet!=null){
            try {
                resultSet.close();
            }catch (SQLException e){
                e.printStackTrace();
            }
        }
        if(statement!=null){
            try {
                statement.close();
            }catch (SQLException e){
                e.printStackTrace();
            }
        }
        if(connection!=null){
            try {
                connection.close();
            }catch (SQLException e){
                e.printStackTrace();
            }
        }
    }

}